K9A2 CF-F two beeps at startup

Greetings, I just finished building my computer and when I finally booted it up it did it's things and proceeded to beep 2 short times.
According to the AMI Bios codes it means that there's a parity error (I do not fully understand what a parity error means). I have tried reseating the ram sticks without luck, no matter how i position them I still get the two beeps, I also came across my old DDR2 PC4300 ram sticks which is the slowest ram the motherboard could handle.
I decided to try removing the new ram and installing one of the old sticks, the machine sucessfully booted but then proceeded to beep twice.
I've tried everything I know and it just won't seem to go away. The weird thing however is that, if I boot into Ubuntu, I cannot notice that there's any problems with the ram, its working swimmingly so far.

Thanks a lot. It seems like it does actually count the number of usb devices. I tried adding 4 usb devices and it did indeed beep four times

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